Improved power mortising-machine



Wife effets,

ROCESS) UNrrE' STATES PATENT; OFFICE.

IMPROVED POWER MORTISING-MACHINE.

Specification forming part of Letters Patent NO.A3S,S9S, dated June 16, 1863.

T0 all whom, it may concern,.-

Be it known that I, GEO` W. GOULD, of Norwich, in the county of New London and State of Connecticut, have invented a new and usefulimprovement in power mortising-machines, by which greater rapidity, accuracy, and iirmness `are attained in the use of the machine 5 and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

To enable others skilled in the artl to make and use my invention, I will proceed to describe its construction and operation, reference being had to the accompanying drawings, making a part of this specification, in whichl Figure lis a front view. Fig. 2 is a side sectional view. Fig. 3 is a top sectional view.

Similarlettersrepresentcorrespondingparts in each of the figures.

The iron frame C is cast whole. This casting is placed near the top and inside of the cast-iron column of the mortising-machine A, having an aperture in each of the four sides near the top, thus leaving the corners running up to the top of the machine, and to the four corners a a a a are attached the V-shaped ways or guides D D D D, by which the frame C is held iirmly in its place and acts freely in its vertical motion. This casting C has usually been in a form thus, LJ, being disconnected at the top, and in consequence has been easily broken by the jar occasioned in the operation of the machine when in use. The casting has also been confined in its place in V-shaped ways or guides, only on two corners instead of four, thus throwing the whole weight of the casting C upon one side, and

tending to an irregular wear and increase of` friction and wearing loose quickly in the V guides, the whole of which is obviated by the present arrangement of casting whole, and guided on four corners instead of two, as has been heretofore done. The pulley N is placed inside of the casting C, to which the power is applied to drive or work the machine.

In order to show the use of the casting C we now mention its connections with other parts of the machine not shown in drawings, because they are such as are in common use in other machines. Through the pulley N is a shaft, to which is attached in front ay iiyf wheel, connecting with the chisel-gate by a pitman, for giving motion to the chisel. To the bottom of the casting C is attached an iron rod,passing down inside the column A, and connecting with the treadle, which passes through the column at the opening T, and by a weight on the back end of the treadle and short fulcrum inside the column, the casting C with all its attachments is balancedand kept up in its proper position while in motion, and when in use the piece to be mortised is placed on the rest B, the foot placed on the treadle and pressed gently down, by which the chisel every stroke goes deeper until it reaches the bottom of the mortise, when the foot is removed from the treadle and the-weight on the back end of treadle carries the casting C with all its appendages up to its rst position. The rest B, on which the stuff to be mortised is placed, is of the usual kind, eX- cept much heavier, and is cast hollow on the under side, with a circular iiange, U, with a slot and bolt, l, and connected to the column A in the usual way by a holt, b, thus allowing the rest B to tilt on any angle required, and connecting with this bolt we attach two round bars of iron, E E, of proper size, forming a joint on the bolt at the top end and curved, v

the vlower ends having screws and nuts c c placed on them, and passing down into two sleeves, F F, that are bolted either to the base of the column or the floor, and when the machine is in use the nuts are screwed down and rest on the top of the sleeves F F, thus giving the rest a rm support, which saves the constant jar of the machine, and easily raised or lowered to suit the stuff to be mortised. In connection with the column, below the rest we attach a rack, G, and a lever, H, by which lever having its fulcrum-pin placed in the notches of the rack G the rest may be raised with perfect ease without regard to the weight upon it, which cannot be done with the ordinary rack and pinion. Upon the side of the column we place an iron frame, I, moving in V ways or guides L L, which are bolted to the column A in a horizontal position, and in which the iron frame I is held and moved horizontally, to which are attached ahorizontal shaft, O, and vertical shaft, P, connected by bevel-gears d d; also, a rack and pinion, g g and It h, bywhich the same is moved by a hand-wheel, M, at the pleasure of the operator, thus forming an auxiliary boring apparatus which may have a lateral motion of any distance required, and a vertical motion to the bit-shaft, the power being applied to the pulley R, which is kept in place by the clutch k being screwed to the column, the shaft O sliding through the pulley It by means of a spline, thus allowing the pulley to remain always in one place, while the frame I with all its attachments moves forward or back at pleasure, so that a succession of holes may be bored at any desired point without stopping the machine or the auger. The hand-Wheel S does not belong to the machine, but was put onthe model for convenience of operating by hand, and` should have been left 0E the drawing, I think. On the top end of the boring-shaft P is connected a vertical piece, W, halved or grooved together, so as to expand and contract as required, extending up and connecting with a horizontal piece, W, forming a right angle, and supported by the brace X; also, connected with the upper part of the frame W are four pulleys. The two pulleys m m keep the cord in place, passing from the weight K over said pulleys, and connecting with the lower section of the vertical part of the frame \V. The other two pulleys, n n, hold the frame W in position, and by resting on the rod or bar Y, which may be fastened tofthe iloor overhead or to the upper part of the 1na chine, allows the frame I, with all its appendages, to be moved with ease, accuracy, and dispatch, simply by turning the hand-wheel M, and the shaft P always retains its vertical position. This bit-shaft is brought down by the handle J and raised by the weight K, in

connection with frame, cord, and pulleys, as'

shown in Fig. 2, by which devices the Weight raises the bit-shaft always perpendicular.

What I claim, and desire to secure by Letters Patent, is

1. Theiron frame C, cast whole, top, bottom, and sides, and the arrangement of the four guides, one on each corner of the same, D D D D, Fig. 3.

2. The arrangement of the iron rods and screws E E, connecting with the sleeves F F, for the support of the rest B.

3. The rack G and lever H, by which the rest is raised or lowered with ease and accuracy.

4. The auxiliary boring attachment by which it is moved and held in position without stopping the machine, and its connection with the expanding attachment of the bit-shaft, and the pulley, frame, cord, and weight.

GEO. W. GOULD.

Witnesses C. B. ROGERS, Gno. W. ROGERS. 

